./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:28:55,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:28:55,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:28:55,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:28:55,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:28:55,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:28:55,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:28:55,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:28:55,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:28:55,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:28:55,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:28:55,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:28:55,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:28:55,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:28:55,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:28:55,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:28:55,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:28:55,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:28:55,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:28:55,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:28:55,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:28:55,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:28:55,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:28:55,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:28:55,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:28:55,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:28:55,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:28:55,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:28:55,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:28:55,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:28:55,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:28:55,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:28:55,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:28:55,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:28:55,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:28:55,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:28:55,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:28:55,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:28:55,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:28:55,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:28:55,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:28:55,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:28:55,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:28:55,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:28:55,893 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:28:55,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:28:55,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:28:55,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:28:55,895 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:28:55,895 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:28:55,896 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:28:55,896 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:28:55,897 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:28:55,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:28:55,898 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:28:55,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:28:55,898 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:28:55,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:28:55,899 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:28:55,899 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:28:55,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:28:55,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:28:55,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:28:55,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:28:55,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:28:55,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:28:55,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:28:55,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:28:55,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:28:55,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:28:55,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:28:55,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:28:55,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:28:55,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:28:55,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:28:55,906 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:28:55,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:28:55,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:28:55,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:28:55,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:28:55,908 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54849713272284bcfc1d249b79bdfa502d33e8d1537f459c00022c26afd8a94c [2021-11-23 02:28:56,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:28:56,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:28:56,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:28:56,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:28:56,202 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:28:56,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-23 02:28:56,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/data/a77f81415/c7337dc63fc146929b7d492be7035bbc/FLAGa81e22800 [2021-11-23 02:28:57,505 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:28:57,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-23 02:28:57,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/data/a77f81415/c7337dc63fc146929b7d492be7035bbc/FLAGa81e22800 [2021-11-23 02:28:57,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/data/a77f81415/c7337dc63fc146929b7d492be7035bbc [2021-11-23 02:28:57,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:28:57,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:28:57,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:28:57,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:28:57,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:28:57,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:57" (1/1) ... [2021-11-23 02:28:57,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb419d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:57, skipping insertion in model container [2021-11-23 02:28:57,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:57" (1/1) ... [2021-11-23 02:28:57,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:28:57,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:29:03,590 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-23 02:29:03,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-23 02:29:03,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-23 02:29:03,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-23 02:29:03,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:29:03,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:29:04,342 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508632,508645] [2021-11-23 02:29:04,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508801,508814] [2021-11-23 02:29:04,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[508968,508981] [2021-11-23 02:29:04,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i[509136,509149] [2021-11-23 02:29:04,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:29:04,730 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:29:04,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04 WrapperNode [2021-11-23 02:29:04,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:29:04,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:29:04,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:29:04,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:29:04,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:04,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,247 INFO L137 Inliner]: procedures = 678, calls = 4011, calls flagged for inlining = 356, calls inlined = 330, statements flattened = 10084 [2021-11-23 02:29:05,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:29:05,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:29:05,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:29:05,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:29:05,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:29:05,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:29:05,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:29:05,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:29:05,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (1/1) ... [2021-11-23 02:29:05,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:29:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:05,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:29:05,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:29:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_93 [2021-11-23 02:29:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_93 [2021-11-23 02:29:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:29:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:29:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2021-11-23 02:29:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2021-11-23 02:29:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_core [2021-11-23 02:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_core [2021-11-23 02:29:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2021-11-23 02:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2021-11-23 02:29:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_post_phy_linkchg [2021-11-23 02:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_post_phy_linkchg [2021-11-23 02:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:29:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:29:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_80 [2021-11-23 02:29:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_80 [2021-11-23 02:29:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-23 02:29:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-23 02:29:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:29:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:29:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_rx_ring [2021-11-23 02:29:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_rx_ring [2021-11-23 02:29:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:29:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:29:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 02:29:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 02:29:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:29:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:29:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:29:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:29:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_current_addr [2021-11-23 02:29:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_current_addr [2021-11-23 02:29:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:29:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:29:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_mac [2021-11-23 02:29:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_mac [2021-11-23 02:29:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_irq_disable [2021-11-23 02:29:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_irq_disable [2021-11-23 02:29:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_stop_phy_polling [2021-11-23 02:29:05,936 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_stop_phy_polling [2021-11-23 02:29:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:29:05,937 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:29:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:29:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:29:05,938 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:29:05,938 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:29:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:29:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:29:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:29:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:29:05,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:29:05,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:29:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:29:05,940 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:29:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:29:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:29:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-23 02:29:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-23 02:29:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:29:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:29:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:29:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_speed_and_duplex [2021-11-23 02:29:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_speed_and_duplex [2021-11-23 02:29:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_mdio_lock_of_atl1c_adapter [2021-11-23 02:29:05,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_mdio_lock_of_atl1c_adapter [2021-11-23 02:29:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-23 02:29:05,943 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-23 02:29:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_close [2021-11-23 02:29:05,943 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_close [2021-11-23 02:29:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:29:05,944 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:29:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_reg [2021-11-23 02:29:05,944 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_reg [2021-11-23 02:29:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:29:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_init [2021-11-23 02:29:05,945 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_init [2021-11-23 02:29:05,945 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_dbg [2021-11-23 02:29:05,945 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_dbg [2021-11-23 02:29:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_regs_len [2021-11-23 02:29:05,946 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_regs_len [2021-11-23 02:29:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:29:05,947 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:29:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:29:05,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:29:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_free_ring_resources [2021-11-23 02:29:05,948 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_free_ring_resources [2021-11-23 02:29:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:29:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:29:05,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:29:05,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:29:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:29:05,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:29:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:29:05,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:29:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:29:05,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:29:05,949 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-23 02:29:05,950 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-23 02:29:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:29:05,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:29:05,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:29:05,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:29:05,951 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:29:05,952 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:29:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_multi [2021-11-23 02:29:05,954 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_multi [2021-11-23 02:29:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:29:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:29:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:29:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:29:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-23 02:29:05,956 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-23 02:29:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:29:05,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:29:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:29:05,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:29:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:29:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_start_phy_polling [2021-11-23 02:29:05,964 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_start_phy_polling [2021-11-23 02:29:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2021-11-23 02:29:05,964 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2021-11-23 02:29:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:29:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:29:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:29:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-23 02:29:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-23 02:29:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:29:05,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:29:05,965 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-23 02:29:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-23 02:29:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_core [2021-11-23 02:29:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_core [2021-11-23 02:29:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_wait_until_idle [2021-11-23 02:29:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_wait_until_idle [2021-11-23 02:29:05,966 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:29:05,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:29:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-23 02:29:05,967 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-23 02:29:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:29:05,967 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:29:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_check_link_status [2021-11-23 02:29:05,967 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_check_link_status [2021-11-23 02:29:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:29:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:29:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_alloc_rx_buffer [2021-11-23 02:29:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_alloc_rx_buffer [2021-11-23 02:29:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_mdio_lock_of_atl1c_adapter [2021-11-23 02:29:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_mdio_lock_of_atl1c_adapter [2021-11-23 02:29:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_io_resume [2021-11-23 02:29:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_io_resume [2021-11-23 02:29:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_dbg [2021-11-23 02:29:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_dbg [2021-11-23 02:29:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_wait_mdio_idle [2021-11-23 02:29:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_wait_mdio_idle [2021-11-23 02:29:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:29:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:29:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:29:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:29:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_vlan_mode [2021-11-23 02:29:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_vlan_mode [2021-11-23 02:29:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_tx_buffer [2021-11-23 02:29:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_tx_buffer [2021-11-23 02:29:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_down [2021-11-23 02:29:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_down [2021-11-23 02:29:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_suspend [2021-11-23 02:29:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_suspend [2021-11-23 02:29:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:29:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:29:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-23 02:29:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-23 02:29:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 02:29:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 02:29:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:29:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:29:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:29:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:29:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:29:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:29:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:29:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-23 02:29:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:29:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:29:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:29:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:29:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-23 02:29:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-23 02:29:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_tx_timeout [2021-11-23 02:29:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_tx_timeout [2021-11-23 02:29:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-23 02:29:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-23 02:29:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:29:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:29:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_tpd [2021-11-23 02:29:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_tpd [2021-11-23 02:29:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_hw_set_mac_addr [2021-11-23 02:29:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_hw_set_mac_addr [2021-11-23 02:29:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:29:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:29:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-23 02:29:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-23 02:29:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-23 02:29:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-23 02:29:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_restart_autoneg [2021-11-23 02:29:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_restart_autoneg [2021-11-23 02:29:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_rxbufsize [2021-11-23 02:29:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_rxbufsize [2021-11-23 02:29:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:29:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:29:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:29:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:29:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_free_irq [2021-11-23 02:29:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_free_irq [2021-11-23 02:29:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-23 02:29:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-23 02:29:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_write_phy_ext [2021-11-23 02:29:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_write_phy_ext [2021-11-23 02:29:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-23 02:29:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-23 02:29:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:29:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:29:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:29:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-23 02:29:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-23 02:29:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_nway_reset [2021-11-23 02:29:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_nway_reset [2021-11-23 02:29:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_dma_ring [2021-11-23 02:29:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_dma_ring [2021-11-23 02:29:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:29:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:29:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:29:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_irq_enable [2021-11-23 02:29:05,984 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_irq_enable [2021-11-23 02:29:05,984 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-23 02:29:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-23 02:29:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_get_eeprom_len [2021-11-23 02:29:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_get_eeprom_len [2021-11-23 02:29:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:29:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:29:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:29:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-23 02:29:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-23 02:29:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_check_eeprom_exist [2021-11-23 02:29:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_check_eeprom_exist [2021-11-23 02:29:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-23 02:29:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-23 02:29:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 02:29:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 02:29:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_netpoll [2021-11-23 02:29:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_netpoll [2021-11-23 02:29:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:29:05,988 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:29:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:29:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:29:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:29:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:29:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_configure [2021-11-23 02:29:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_configure [2021-11-23 02:29:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2021-11-23 02:29:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2021-11-23 02:29:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_85 [2021-11-23 02:29:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_85 [2021-11-23 02:29:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_tx_ring [2021-11-23 02:29:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_tx_ring [2021-11-23 02:29:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_reset [2021-11-23 02:29:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_reset [2021-11-23 02:29:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_open [2021-11-23 02:29:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_open [2021-11-23 02:29:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:29:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:29:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:29:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:29:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-23 02:29:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-23 02:29:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-23 02:29:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-23 02:29:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_intr [2021-11-23 02:29:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_intr [2021-11-23 02:29:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:29:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:29:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_power_saving [2021-11-23 02:29:05,992 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_power_saving [2021-11-23 02:29:05,992 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_phy_setup_adv [2021-11-23 02:29:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_phy_setup_adv [2021-11-23 02:29:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-23 02:29:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-23 02:29:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:29:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:29:05,993 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_clean_buffer [2021-11-23 02:29:05,993 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_clean_buffer [2021-11-23 02:29:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_remove [2021-11-23 02:29:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_remove [2021-11-23 02:29:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:29:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:29:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:29:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_86 [2021-11-23 02:29:05,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_86 [2021-11-23 02:29:05,994 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:29:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:29:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-23 02:29:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-23 02:29:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_up [2021-11-23 02:29:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_up [2021-11-23 02:29:05,995 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-23 02:29:05,995 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-23 02:29:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_disable_l0s_l1 [2021-11-23 02:29:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_disable_l0s_l1 [2021-11-23 02:29:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_resume [2021-11-23 02:29:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_resume [2021-11-23 02:29:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdrlen [2021-11-23 02:29:05,996 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdrlen [2021-11-23 02:29:05,996 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_reset_pcie [2021-11-23 02:29:05,997 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_reset_pcie [2021-11-23 02:29:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:29:05,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:29:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-23 02:29:05,997 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-23 02:29:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:29:05,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-23 02:29:05,997 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_shutdown [2021-11-23 02:29:05,998 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_shutdown [2021-11-23 02:29:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_set_aspm [2021-11-23 02:29:05,998 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_set_aspm [2021-11-23 02:29:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-23 02:29:05,998 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-23 02:29:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-23 02:29:05,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-23 02:29:05,998 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:29:05,999 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:29:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure atl1c_read_phy_reg [2021-11-23 02:29:05,999 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1c_read_phy_reg [2021-11-23 02:29:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:29:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:29:05,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:29:07,453 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:29:07,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:29:07,940 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:29:17,457 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:29:20,209 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:29:20,210 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:29:20,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:20 BoogieIcfgContainer [2021-11-23 02:29:20,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:29:20,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:29:20,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:29:20,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:29:20,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:28:57" (1/3) ... [2021-11-23 02:29:20,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77713428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:20, skipping insertion in model container [2021-11-23 02:29:20,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:04" (2/3) ... [2021-11-23 02:29:20,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77713428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:20, skipping insertion in model container [2021-11-23 02:29:20,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:20" (3/3) ... [2021-11-23 02:29:20,229 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-atheros-atl1c-atl1c.cil.i [2021-11-23 02:29:20,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:29:20,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-23 02:29:20,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:29:20,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:29:20,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 02:29:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 2967 states, 1723 states have (on average 1.2391178177597215) internal successors, (2135), 1778 states have internal predecessors, (2135), 1081 states have call successors, (1081), 159 states have call predecessors, (1081), 158 states have return successors, (1074), 1065 states have call predecessors, (1074), 1074 states have call successors, (1074) [2021-11-23 02:29:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:29:20,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:20,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:20,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:29:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1965657531, now seen corresponding path program 1 times [2021-11-23 02:29:20,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534293410] [2021-11-23 02:29:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:20,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:29:21,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534293410] [2021-11-23 02:29:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534293410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:21,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:21,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302947034] [2021-11-23 02:29:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:21,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:21,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:21,218 INFO L87 Difference]: Start difference. First operand has 2967 states, 1723 states have (on average 1.2391178177597215) internal successors, (2135), 1778 states have internal predecessors, (2135), 1081 states have call successors, (1081), 159 states have call predecessors, (1081), 158 states have return successors, (1074), 1065 states have call predecessors, (1074), 1074 states have call successors, (1074) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:29:24,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:25,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:29,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:32,651 INFO L93 Difference]: Finished difference Result 8864 states and 12986 transitions. [2021-11-23 02:29:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:29:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2021-11-23 02:29:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:32,723 INFO L225 Difference]: With dead ends: 8864 [2021-11-23 02:29:32,723 INFO L226 Difference]: Without dead ends: 5894 [2021-11-23 02:29:32,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:32,752 INFO L933 BasicCegarLoop]: 5461 mSDtfsCounter, 4263 mSDsluCounter, 16119 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4279 SdHoareTripleChecker+Valid, 20192 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:32,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4279 Valid, 20192 Invalid, 1893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 02:29:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5894 states. [2021-11-23 02:29:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5894 to 5886. [2021-11-23 02:29:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5886 states, 3426 states have (on average 1.2340922358435493) internal successors, (4228), 3524 states have internal predecessors, (4228), 2141 states have call successors, (2141), 317 states have call predecessors, (2141), 315 states have return successors, (2135), 2117 states have call predecessors, (2135), 2135 states have call successors, (2135) [2021-11-23 02:29:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5886 states to 5886 states and 8504 transitions. [2021-11-23 02:29:33,554 INFO L78 Accepts]: Start accepts. Automaton has 5886 states and 8504 transitions. Word has length 35 [2021-11-23 02:29:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:33,556 INFO L470 AbstractCegarLoop]: Abstraction has 5886 states and 8504 transitions. [2021-11-23 02:29:33,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:29:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5886 states and 8504 transitions. [2021-11-23 02:29:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:29:33,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:33,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:33,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:29:33,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:29:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -703999484, now seen corresponding path program 1 times [2021-11-23 02:29:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524732943] [2021-11-23 02:29:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:33,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:29:33,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524732943] [2021-11-23 02:29:33,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524732943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:33,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:33,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:33,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618493918] [2021-11-23 02:29:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:33,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:33,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:33,814 INFO L87 Difference]: Start difference. First operand 5886 states and 8504 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:37,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:42,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:43,768 INFO L93 Difference]: Finished difference Result 8817 states and 12730 transitions. [2021-11-23 02:29:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:29:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2021-11-23 02:29:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:43,855 INFO L225 Difference]: With dead ends: 8817 [2021-11-23 02:29:43,855 INFO L226 Difference]: Without dead ends: 8815 [2021-11-23 02:29:43,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:43,863 INFO L933 BasicCegarLoop]: 5793 mSDtfsCounter, 4217 mSDsluCounter, 16919 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4231 SdHoareTripleChecker+Valid, 21163 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4231 Valid, 21163 Invalid, 2136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 2132 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 02:29:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8815 states. [2021-11-23 02:29:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8815 to 8805. [2021-11-23 02:29:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 5128 states have (on average 1.234204368174727) internal successors, (6329), 5274 states have internal predecessors, (6329), 3201 states have call successors, (3201), 475 states have call predecessors, (3201), 472 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:29:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 12722 transitions. [2021-11-23 02:29:45,004 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 12722 transitions. Word has length 40 [2021-11-23 02:29:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:45,004 INFO L470 AbstractCegarLoop]: Abstraction has 8805 states and 12722 transitions. [2021-11-23 02:29:45,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 12722 transitions. [2021-11-23 02:29:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:29:45,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:45,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:45,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:29:45,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:29:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1653435165, now seen corresponding path program 1 times [2021-11-23 02:29:45,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196873106] [2021-11-23 02:29:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:45,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:29:45,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196873106] [2021-11-23 02:29:45,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196873106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:45,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:45,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583054817] [2021-11-23 02:29:45,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:45,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:45,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:45,358 INFO L87 Difference]: Start difference. First operand 8805 states and 12722 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:29:51,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:54,743 INFO L93 Difference]: Finished difference Result 8823 states and 12735 transitions. [2021-11-23 02:29:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:29:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2021-11-23 02:29:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:54,832 INFO L225 Difference]: With dead ends: 8823 [2021-11-23 02:29:54,832 INFO L226 Difference]: Without dead ends: 8821 [2021-11-23 02:29:54,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:29:54,844 INFO L933 BasicCegarLoop]: 5431 mSDtfsCounter, 4236 mSDsluCounter, 16034 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4249 SdHoareTripleChecker+Valid, 20077 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:54,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4249 Valid, 20077 Invalid, 1893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:29:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-11-23 02:29:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8813. [2021-11-23 02:29:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8813 states, 5134 states have (on average 1.2339306583560576) internal successors, (6335), 5280 states have internal predecessors, (6335), 3201 states have call successors, (3201), 477 states have call predecessors, (3201), 474 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:29:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 12728 transitions. [2021-11-23 02:29:55,825 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 12728 transitions. Word has length 51 [2021-11-23 02:29:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:55,827 INFO L470 AbstractCegarLoop]: Abstraction has 8813 states and 12728 transitions. [2021-11-23 02:29:55,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:29:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 12728 transitions. [2021-11-23 02:29:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:29:55,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:55,830 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:29:55,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:29:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1446431908, now seen corresponding path program 1 times [2021-11-23 02:29:55,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:55,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173107232] [2021-11-23 02:29:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:29:56,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173107232] [2021-11-23 02:29:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173107232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:56,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:56,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:29:56,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213835886] [2021-11-23 02:29:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:56,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:56,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:56,079 INFO L87 Difference]: Start difference. First operand 8813 states and 12728 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:29:59,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:02,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:04,850 INFO L93 Difference]: Finished difference Result 8831 states and 12741 transitions. [2021-11-23 02:30:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:04,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-23 02:30:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:04,919 INFO L225 Difference]: With dead ends: 8831 [2021-11-23 02:30:04,919 INFO L226 Difference]: Without dead ends: 8829 [2021-11-23 02:30:04,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:04,928 INFO L933 BasicCegarLoop]: 5426 mSDtfsCounter, 4236 mSDsluCounter, 16024 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4248 SdHoareTripleChecker+Valid, 20062 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:04,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4248 Valid, 20062 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 02:30:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2021-11-23 02:30:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 8821. [2021-11-23 02:30:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 5140 states have (on average 1.2336575875486382) internal successors, (6341), 5286 states have internal predecessors, (6341), 3201 states have call successors, (3201), 479 states have call predecessors, (3201), 476 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:30:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 12734 transitions. [2021-11-23 02:30:05,860 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 12734 transitions. Word has length 56 [2021-11-23 02:30:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:05,860 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 12734 transitions. [2021-11-23 02:30:05,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:30:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 12734 transitions. [2021-11-23 02:30:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:30:05,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:05,863 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:05,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:30:05,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash -209665925, now seen corresponding path program 1 times [2021-11-23 02:30:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027343226] [2021-11-23 02:30:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:05,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:30:06,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027343226] [2021-11-23 02:30:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027343226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:06,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:06,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:06,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868539584] [2021-11-23 02:30:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:06,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:06,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:06,057 INFO L87 Difference]: Start difference. First operand 8821 states and 12734 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:30:08,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:09,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:13,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:15,169 INFO L93 Difference]: Finished difference Result 8839 states and 12747 transitions. [2021-11-23 02:30:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2021-11-23 02:30:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:15,219 INFO L225 Difference]: With dead ends: 8839 [2021-11-23 02:30:15,219 INFO L226 Difference]: Without dead ends: 8837 [2021-11-23 02:30:15,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:15,228 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 4240 mSDsluCounter, 16056 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4251 SdHoareTripleChecker+Valid, 20110 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4251 Valid, 20110 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-23 02:30:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8837 states. [2021-11-23 02:30:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8837 to 8829. [2021-11-23 02:30:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8829 states, 5146 states have (on average 1.233385153517295) internal successors, (6347), 5292 states have internal predecessors, (6347), 3201 states have call successors, (3201), 481 states have call predecessors, (3201), 478 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:30:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8829 states to 8829 states and 12740 transitions. [2021-11-23 02:30:16,058 INFO L78 Accepts]: Start accepts. Automaton has 8829 states and 12740 transitions. Word has length 55 [2021-11-23 02:30:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:16,059 INFO L470 AbstractCegarLoop]: Abstraction has 8829 states and 12740 transitions. [2021-11-23 02:30:16,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:30:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8829 states and 12740 transitions. [2021-11-23 02:30:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 02:30:16,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:16,062 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:16,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:30:16,062 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash -572548, now seen corresponding path program 1 times [2021-11-23 02:30:16,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299088575] [2021-11-23 02:30:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:16,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:30:16,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:16,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299088575] [2021-11-23 02:30:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299088575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:16,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292465795] [2021-11-23 02:30:16,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:16,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:16,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:16,255 INFO L87 Difference]: Start difference. First operand 8829 states and 12740 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:30:19,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:23,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:24,204 INFO L93 Difference]: Finished difference Result 8845 states and 12751 transitions. [2021-11-23 02:30:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2021-11-23 02:30:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:24,247 INFO L225 Difference]: With dead ends: 8845 [2021-11-23 02:30:24,248 INFO L226 Difference]: Without dead ends: 8843 [2021-11-23 02:30:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:24,254 INFO L933 BasicCegarLoop]: 5793 mSDtfsCounter, 4213 mSDsluCounter, 16919 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4223 SdHoareTripleChecker+Valid, 21163 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:24,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4223 Valid, 21163 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2132 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:30:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2021-11-23 02:30:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8833. [2021-11-23 02:30:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 5149 states have (on average 1.2332491745970091) internal successors, (6350), 5295 states have internal predecessors, (6350), 3201 states have call successors, (3201), 482 states have call predecessors, (3201), 479 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:30:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 12743 transitions. [2021-11-23 02:30:25,016 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 12743 transitions. Word has length 66 [2021-11-23 02:30:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:25,016 INFO L470 AbstractCegarLoop]: Abstraction has 8833 states and 12743 transitions. [2021-11-23 02:30:25,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:30:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 12743 transitions. [2021-11-23 02:30:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:30:25,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:25,018 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:25,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:30:25,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:25,019 INFO L85 PathProgramCache]: Analyzing trace with hash 711852963, now seen corresponding path program 1 times [2021-11-23 02:30:25,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358405218] [2021-11-23 02:30:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:25,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 02:30:25,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358405218] [2021-11-23 02:30:25,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358405218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:25,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:25,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:25,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935020830] [2021-11-23 02:30:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:25,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:25,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:25,235 INFO L87 Difference]: Start difference. First operand 8833 states and 12743 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:30:28,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:31,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:34,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:35,183 INFO L93 Difference]: Finished difference Result 8851 states and 12756 transitions. [2021-11-23 02:30:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 71 [2021-11-23 02:30:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:35,219 INFO L225 Difference]: With dead ends: 8851 [2021-11-23 02:30:35,219 INFO L226 Difference]: Without dead ends: 8849 [2021-11-23 02:30:35,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:35,226 INFO L933 BasicCegarLoop]: 5437 mSDtfsCounter, 4236 mSDsluCounter, 16046 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4245 SdHoareTripleChecker+Valid, 20095 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:35,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4245 Valid, 20095 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:30:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2021-11-23 02:30:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 8841. [2021-11-23 02:30:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 5155 states have (on average 1.2329776915615906) internal successors, (6356), 5301 states have internal predecessors, (6356), 3201 states have call successors, (3201), 484 states have call predecessors, (3201), 481 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:30:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12749 transitions. [2021-11-23 02:30:35,979 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12749 transitions. Word has length 71 [2021-11-23 02:30:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:35,980 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12749 transitions. [2021-11-23 02:30:35,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:30:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12749 transitions. [2021-11-23 02:30:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:30:35,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:35,983 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:35,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:30:35,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1939868572, now seen corresponding path program 1 times [2021-11-23 02:30:35,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969752535] [2021-11-23 02:30:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:35,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 02:30:36,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:36,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969752535] [2021-11-23 02:30:36,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969752535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:36,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:36,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:36,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479189456] [2021-11-23 02:30:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:36,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:36,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:36,174 INFO L87 Difference]: Start difference. First operand 8841 states and 12749 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:30:38,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:39,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:43,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:45,571 INFO L93 Difference]: Finished difference Result 8859 states and 12762 transitions. [2021-11-23 02:30:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:45,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2021-11-23 02:30:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:45,610 INFO L225 Difference]: With dead ends: 8859 [2021-11-23 02:30:45,610 INFO L226 Difference]: Without dead ends: 8857 [2021-11-23 02:30:45,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:45,615 INFO L933 BasicCegarLoop]: 5426 mSDtfsCounter, 4240 mSDsluCounter, 16024 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4248 SdHoareTripleChecker+Valid, 20062 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:45,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4248 Valid, 20062 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 02:30:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8857 states. [2021-11-23 02:30:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8857 to 8849. [2021-11-23 02:30:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 5161 states have (on average 1.2327068397597365) internal successors, (6362), 5307 states have internal predecessors, (6362), 3201 states have call successors, (3201), 486 states have call predecessors, (3201), 483 states have return successors, (3192), 3164 states have call predecessors, (3192), 3192 states have call successors, (3192) [2021-11-23 02:30:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 12755 transitions. [2021-11-23 02:30:46,380 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 12755 transitions. Word has length 70 [2021-11-23 02:30:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:46,382 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 12755 transitions. [2021-11-23 02:30:46,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:30:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 12755 transitions. [2021-11-23 02:30:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 02:30:46,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:46,385 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:46,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:30:46,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1408249603, now seen corresponding path program 1 times [2021-11-23 02:30:46,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278697762] [2021-11-23 02:30:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:46,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-23 02:30:46,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278697762] [2021-11-23 02:30:46,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278697762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:46,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:46,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:46,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394068614] [2021-11-23 02:30:46,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:46,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:46,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:46,571 INFO L87 Difference]: Start difference. First operand 8849 states and 12755 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:30:50,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:51,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:54,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:57,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:30:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:58,135 INFO L93 Difference]: Finished difference Result 11889 states and 17129 transitions. [2021-11-23 02:30:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:30:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 81 [2021-11-23 02:30:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:58,200 INFO L225 Difference]: With dead ends: 11889 [2021-11-23 02:30:58,200 INFO L226 Difference]: Without dead ends: 11887 [2021-11-23 02:30:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:30:58,208 INFO L933 BasicCegarLoop]: 5466 mSDtfsCounter, 4204 mSDsluCounter, 15934 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4211 SdHoareTripleChecker+Valid, 20029 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4211 Valid, 20029 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1874 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2021-11-23 02:30:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2021-11-23 02:30:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 11878. [2021-11-23 02:30:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11878 states, 6944 states have (on average 1.233438940092166) internal successors, (8565), 7144 states have internal predecessors, (8565), 4263 states have call successors, (4263), 674 states have call predecessors, (4263), 667 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:30:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11878 states to 11878 states and 17120 transitions. [2021-11-23 02:30:59,184 INFO L78 Accepts]: Start accepts. Automaton has 11878 states and 17120 transitions. Word has length 81 [2021-11-23 02:30:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:59,185 INFO L470 AbstractCegarLoop]: Abstraction has 11878 states and 17120 transitions. [2021-11-23 02:30:59,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:30:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 11878 states and 17120 transitions. [2021-11-23 02:30:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 02:30:59,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:59,187 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:59,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:30:59,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:30:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2063956924, now seen corresponding path program 1 times [2021-11-23 02:30:59,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001820487] [2021-11-23 02:30:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:59,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:30:59,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:59,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001820487] [2021-11-23 02:30:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001820487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:59,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:59,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:59,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598601495] [2021-11-23 02:30:59,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:59,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:59,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:59,372 INFO L87 Difference]: Start difference. First operand 11878 states and 17120 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:31:02,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:04,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:07,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:10,231 INFO L93 Difference]: Finished difference Result 11896 states and 17133 transitions. [2021-11-23 02:31:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:31:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 86 [2021-11-23 02:31:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:10,296 INFO L225 Difference]: With dead ends: 11896 [2021-11-23 02:31:10,296 INFO L226 Difference]: Without dead ends: 11894 [2021-11-23 02:31:10,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:31:10,307 INFO L933 BasicCegarLoop]: 5440 mSDtfsCounter, 4236 mSDsluCounter, 16050 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4242 SdHoareTripleChecker+Valid, 20104 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:10,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4242 Valid, 20104 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1886 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 02:31:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-11-23 02:31:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11886. [2021-11-23 02:31:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11886 states, 6950 states have (on average 1.2332374100719425) internal successors, (8571), 7150 states have internal predecessors, (8571), 4263 states have call successors, (4263), 676 states have call predecessors, (4263), 669 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:31:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11886 states to 11886 states and 17126 transitions. [2021-11-23 02:31:11,404 INFO L78 Accepts]: Start accepts. Automaton has 11886 states and 17126 transitions. Word has length 86 [2021-11-23 02:31:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:11,404 INFO L470 AbstractCegarLoop]: Abstraction has 11886 states and 17126 transitions. [2021-11-23 02:31:11,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:31:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11886 states and 17126 transitions. [2021-11-23 02:31:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:31:11,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:11,407 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:11,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:31:11,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:31:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1355648209, now seen corresponding path program 1 times [2021-11-23 02:31:11,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:11,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635316726] [2021-11-23 02:31:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:11,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 02:31:11,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635316726] [2021-11-23 02:31:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635316726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:11,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:11,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:31:11,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952655283] [2021-11-23 02:31:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:11,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:11,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:11,621 INFO L87 Difference]: Start difference. First operand 11886 states and 17126 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:31:14,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:16,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:19,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:23,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:23,623 INFO L93 Difference]: Finished difference Result 11895 states and 17131 transitions. [2021-11-23 02:31:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:31:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 103 [2021-11-23 02:31:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:23,681 INFO L225 Difference]: With dead ends: 11895 [2021-11-23 02:31:23,682 INFO L226 Difference]: Without dead ends: 11893 [2021-11-23 02:31:23,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:31:23,692 INFO L933 BasicCegarLoop]: 5463 mSDtfsCounter, 4204 mSDsluCounter, 15949 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4205 SdHoareTripleChecker+Valid, 20041 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:23,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4205 Valid, 20041 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1858 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2021-11-23 02:31:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11893 states. [2021-11-23 02:31:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11893 to 11886. [2021-11-23 02:31:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11886 states, 6950 states have (on average 1.2328057553956835) internal successors, (8568), 7150 states have internal predecessors, (8568), 4263 states have call successors, (4263), 676 states have call predecessors, (4263), 669 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:31:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11886 states to 11886 states and 17123 transitions. [2021-11-23 02:31:24,603 INFO L78 Accepts]: Start accepts. Automaton has 11886 states and 17123 transitions. Word has length 103 [2021-11-23 02:31:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:24,604 INFO L470 AbstractCegarLoop]: Abstraction has 11886 states and 17123 transitions. [2021-11-23 02:31:24,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:31:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11886 states and 17123 transitions. [2021-11-23 02:31:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 02:31:24,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:24,607 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:24,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:31:24,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:31:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1697469027, now seen corresponding path program 1 times [2021-11-23 02:31:24,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766004384] [2021-11-23 02:31:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:24,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-23 02:31:24,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:24,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766004384] [2021-11-23 02:31:24,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766004384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:24,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:24,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:31:24,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290989057] [2021-11-23 02:31:24,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:24,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:24,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:24,779 INFO L87 Difference]: Start difference. First operand 11886 states and 17123 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:31:27,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:29,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:32,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:35,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:36,142 INFO L93 Difference]: Finished difference Result 11902 states and 17135 transitions. [2021-11-23 02:31:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:31:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 91 [2021-11-23 02:31:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:36,177 INFO L225 Difference]: With dead ends: 11902 [2021-11-23 02:31:36,177 INFO L226 Difference]: Without dead ends: 11900 [2021-11-23 02:31:36,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:31:36,181 INFO L933 BasicCegarLoop]: 5435 mSDtfsCounter, 4234 mSDsluCounter, 16040 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 20089 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:36,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 20089 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1886 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:31:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11900 states. [2021-11-23 02:31:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11900 to 11894. [2021-11-23 02:31:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11894 states, 6956 states have (on average 1.232604945370903) internal successors, (8574), 7156 states have internal predecessors, (8574), 4263 states have call successors, (4263), 678 states have call predecessors, (4263), 671 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:31:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11894 states to 11894 states and 17129 transitions. [2021-11-23 02:31:36,841 INFO L78 Accepts]: Start accepts. Automaton has 11894 states and 17129 transitions. Word has length 91 [2021-11-23 02:31:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:36,842 INFO L470 AbstractCegarLoop]: Abstraction has 11894 states and 17129 transitions. [2021-11-23 02:31:36,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:31:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11894 states and 17129 transitions. [2021-11-23 02:31:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:31:36,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:36,845 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:31:36,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:31:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 93430748, now seen corresponding path program 1 times [2021-11-23 02:31:36,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:36,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926911534] [2021-11-23 02:31:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:36,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-23 02:31:37,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:37,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926911534] [2021-11-23 02:31:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926911534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:37,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:37,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:31:37,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717438838] [2021-11-23 02:31:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:37,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:37,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:37,020 INFO L87 Difference]: Start difference. First operand 11894 states and 17129 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:31:41,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:43,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:45,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:47,271 INFO L93 Difference]: Finished difference Result 11912 states and 17146 transitions. [2021-11-23 02:31:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:31:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 96 [2021-11-23 02:31:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:47,304 INFO L225 Difference]: With dead ends: 11912 [2021-11-23 02:31:47,304 INFO L226 Difference]: Without dead ends: 11910 [2021-11-23 02:31:47,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:31:47,310 INFO L933 BasicCegarLoop]: 3831 mSDtfsCounter, 4236 mSDsluCounter, 8507 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 11470 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:47,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4240 Valid, 11470 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1324 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 02:31:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11910 states. [2021-11-23 02:31:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11910 to 11910. [2021-11-23 02:31:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11910 states, 6968 states have (on average 1.2322043628013777) internal successors, (8586), 7168 states have internal predecessors, (8586), 4263 states have call successors, (4263), 682 states have call predecessors, (4263), 675 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:31:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11910 states to 11910 states and 17141 transitions. [2021-11-23 02:31:47,913 INFO L78 Accepts]: Start accepts. Automaton has 11910 states and 17141 transitions. Word has length 96 [2021-11-23 02:31:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:47,914 INFO L470 AbstractCegarLoop]: Abstraction has 11910 states and 17141 transitions. [2021-11-23 02:31:47,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:31:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11910 states and 17141 transitions. [2021-11-23 02:31:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:31:47,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:47,917 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:47,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:31:47,917 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:31:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:47,918 INFO L85 PathProgramCache]: Analyzing trace with hash 181366211, now seen corresponding path program 1 times [2021-11-23 02:31:47,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:47,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795903896] [2021-11-23 02:31:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:47,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-23 02:31:48,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:48,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795903896] [2021-11-23 02:31:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795903896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:48,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:48,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:31:48,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515761391] [2021-11-23 02:31:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:48,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:48,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:48,154 INFO L87 Difference]: Start difference. First operand 11910 states and 17141 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:31:52,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:55,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:58,039 INFO L93 Difference]: Finished difference Result 11926 states and 17153 transitions. [2021-11-23 02:31:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:31:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2021-11-23 02:31:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:58,076 INFO L225 Difference]: With dead ends: 11926 [2021-11-23 02:31:58,076 INFO L226 Difference]: Without dead ends: 11924 [2021-11-23 02:31:58,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:31:58,083 INFO L933 BasicCegarLoop]: 5435 mSDtfsCounter, 4234 mSDsluCounter, 16040 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4237 SdHoareTripleChecker+Valid, 20089 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:58,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4237 Valid, 20089 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1887 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 02:31:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11924 states. [2021-11-23 02:31:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11924 to 11918. [2021-11-23 02:31:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11918 states, 6974 states have (on average 1.2320045884714654) internal successors, (8592), 7174 states have internal predecessors, (8592), 4263 states have call successors, (4263), 684 states have call predecessors, (4263), 677 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:31:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11918 states to 11918 states and 17147 transitions. [2021-11-23 02:31:58,813 INFO L78 Accepts]: Start accepts. Automaton has 11918 states and 17147 transitions. Word has length 101 [2021-11-23 02:31:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:58,813 INFO L470 AbstractCegarLoop]: Abstraction has 11918 states and 17147 transitions. [2021-11-23 02:31:58,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:31:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 11918 states and 17147 transitions. [2021-11-23 02:31:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 02:31:58,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:58,817 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:58,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:31:58,818 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:31:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2010963652, now seen corresponding path program 1 times [2021-11-23 02:31:58,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:58,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787066003] [2021-11-23 02:31:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:58,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-23 02:31:58,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787066003] [2021-11-23 02:31:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787066003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:58,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:58,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:31:58,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345436306] [2021-11-23 02:31:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:58,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:31:58,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:31:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:58,990 INFO L87 Difference]: Start difference. First operand 11918 states and 17147 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:01,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:03,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:07,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:09,619 INFO L93 Difference]: Finished difference Result 11934 states and 17159 transitions. [2021-11-23 02:32:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:32:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 100 [2021-11-23 02:32:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:09,657 INFO L225 Difference]: With dead ends: 11934 [2021-11-23 02:32:09,657 INFO L226 Difference]: Without dead ends: 11932 [2021-11-23 02:32:09,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:32:09,665 INFO L933 BasicCegarLoop]: 5435 mSDtfsCounter, 4238 mSDsluCounter, 16040 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 20089 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4240 Valid, 20089 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1887 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:32:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-11-23 02:32:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 11926. [2021-11-23 02:32:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11926 states, 6980 states have (on average 1.2318051575931233) internal successors, (8598), 7180 states have internal predecessors, (8598), 4263 states have call successors, (4263), 686 states have call predecessors, (4263), 679 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:32:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11926 states to 11926 states and 17153 transitions. [2021-11-23 02:32:10,374 INFO L78 Accepts]: Start accepts. Automaton has 11926 states and 17153 transitions. Word has length 100 [2021-11-23 02:32:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:10,374 INFO L470 AbstractCegarLoop]: Abstraction has 11926 states and 17153 transitions. [2021-11-23 02:32:10,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11926 states and 17153 transitions. [2021-11-23 02:32:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:32:10,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:10,378 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:32:10,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:32:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1526693597, now seen corresponding path program 1 times [2021-11-23 02:32:10,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:10,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423840006] [2021-11-23 02:32:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-23 02:32:10,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423840006] [2021-11-23 02:32:10,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423840006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:10,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:32:10,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420929736] [2021-11-23 02:32:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:10,537 INFO L87 Difference]: Start difference. First operand 11926 states and 17153 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:32:13,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:17,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:19,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:20,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:21,379 INFO L93 Difference]: Finished difference Result 11944 states and 17170 transitions. [2021-11-23 02:32:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:32:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 111 [2021-11-23 02:32:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:21,429 INFO L225 Difference]: With dead ends: 11944 [2021-11-23 02:32:21,429 INFO L226 Difference]: Without dead ends: 11940 [2021-11-23 02:32:21,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:32:21,439 INFO L933 BasicCegarLoop]: 3831 mSDtfsCounter, 4236 mSDsluCounter, 8507 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4237 SdHoareTripleChecker+Valid, 11470 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4237 Valid, 11470 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1324 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-11-23 02:32:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2021-11-23 02:32:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 11940. [2021-11-23 02:32:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11940 states, 6991 states have (on average 1.231297382348734) internal successors, (8608), 7190 states have internal predecessors, (8608), 4263 states have call successors, (4263), 690 states have call predecessors, (4263), 682 states have return successors, (4292), 4205 states have call predecessors, (4292), 4251 states have call successors, (4292) [2021-11-23 02:32:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11940 states to 11940 states and 17163 transitions. [2021-11-23 02:32:22,256 INFO L78 Accepts]: Start accepts. Automaton has 11940 states and 17163 transitions. Word has length 111 [2021-11-23 02:32:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:22,257 INFO L470 AbstractCegarLoop]: Abstraction has 11940 states and 17163 transitions. [2021-11-23 02:32:22,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:32:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 11940 states and 17163 transitions. [2021-11-23 02:32:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:32:22,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:22,262 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:22,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:32:22,262 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:32:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2127707364, now seen corresponding path program 1 times [2021-11-23 02:32:22,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:22,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531105933] [2021-11-23 02:32:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:22,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-23 02:32:22,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531105933] [2021-11-23 02:32:22,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531105933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:22,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:22,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:32:22,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266110709] [2021-11-23 02:32:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:22,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:22,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:22,412 INFO L87 Difference]: Start difference. First operand 11940 states and 17163 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:32:26,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:30,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:32,950 INFO L93 Difference]: Finished difference Result 23032 states and 33053 transitions. [2021-11-23 02:32:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:32:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 110 [2021-11-23 02:32:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:33,050 INFO L225 Difference]: With dead ends: 23032 [2021-11-23 02:32:33,051 INFO L226 Difference]: Without dead ends: 22875 [2021-11-23 02:32:33,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:32:33,063 INFO L933 BasicCegarLoop]: 5165 mSDtfsCounter, 3941 mSDsluCounter, 15426 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3941 SdHoareTripleChecker+Valid, 19265 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:33,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3941 Valid, 19265 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1798 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 02:32:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22875 states. [2021-11-23 02:32:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22875 to 22863. [2021-11-23 02:32:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 13388 states have (on average 1.2322975799223186) internal successors, (16498), 13770 states have internal predecessors, (16498), 8161 states have call successors, (8161), 1324 states have call predecessors, (8161), 1310 states have return successors, (8221), 8047 states have call predecessors, (8221), 8139 states have call successors, (8221) [2021-11-23 02:32:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 32880 transitions. [2021-11-23 02:32:34,810 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 32880 transitions. Word has length 110 [2021-11-23 02:32:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:34,810 INFO L470 AbstractCegarLoop]: Abstraction has 22863 states and 32880 transitions. [2021-11-23 02:32:34,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:32:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 32880 transitions. [2021-11-23 02:32:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 02:32:34,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:34,818 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:32:34,818 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:32:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2145185121, now seen corresponding path program 1 times [2021-11-23 02:32:34,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850605722] [2021-11-23 02:32:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:34,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-23 02:32:34,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:34,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850605722] [2021-11-23 02:32:34,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850605722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:34,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:34,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:34,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724472827] [2021-11-23 02:32:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:34,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:34,981 INFO L87 Difference]: Start difference. First operand 22863 states and 32880 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-23 02:32:37,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:41,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:42,218 INFO L93 Difference]: Finished difference Result 45890 states and 67227 transitions. [2021-11-23 02:32:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 161 [2021-11-23 02:32:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:42,314 INFO L225 Difference]: With dead ends: 45890 [2021-11-23 02:32:42,315 INFO L226 Difference]: Without dead ends: 23043 [2021-11-23 02:32:42,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:42,458 INFO L933 BasicCegarLoop]: 3835 mSDtfsCounter, 10 mSDsluCounter, 4259 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7663 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:42,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7663 Invalid, 870 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 869 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 02:32:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23043 states. [2021-11-23 02:32:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23043 to 22875. [2021-11-23 02:32:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22875 states, 13400 states have (on average 1.232089552238806) internal successors, (16510), 13782 states have internal predecessors, (16510), 8161 states have call successors, (8161), 1324 states have call predecessors, (8161), 1310 states have return successors, (8221), 8047 states have call predecessors, (8221), 8139 states have call successors, (8221) [2021-11-23 02:32:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22875 states to 22875 states and 32892 transitions. [2021-11-23 02:32:44,532 INFO L78 Accepts]: Start accepts. Automaton has 22875 states and 32892 transitions. Word has length 161 [2021-11-23 02:32:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:44,533 INFO L470 AbstractCegarLoop]: Abstraction has 22875 states and 32892 transitions. [2021-11-23 02:32:44,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-23 02:32:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22875 states and 32892 transitions. [2021-11-23 02:32:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 02:32:44,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:44,541 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:44,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:32:44,542 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:32:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2020244875, now seen corresponding path program 1 times [2021-11-23 02:32:44,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:44,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935036843] [2021-11-23 02:32:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:44,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-23 02:32:44,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935036843] [2021-11-23 02:32:44,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935036843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:44,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:44,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:32:44,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903030833] [2021-11-23 02:32:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:44,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:44,744 INFO L87 Difference]: Start difference. First operand 22875 states and 32892 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:32:48,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:52,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:52,950 INFO L93 Difference]: Finished difference Result 23129 states and 33213 transitions. [2021-11-23 02:32:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:32:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 171 [2021-11-23 02:32:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:53,060 INFO L225 Difference]: With dead ends: 23129 [2021-11-23 02:32:53,060 INFO L226 Difference]: Without dead ends: 22917 [2021-11-23 02:32:53,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:32:53,080 INFO L933 BasicCegarLoop]: 3899 mSDtfsCounter, 230 mSDsluCounter, 12870 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 15461 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:53,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 15461 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1763 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 02:32:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22917 states. [2021-11-23 02:32:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22917 to 22917. [2021-11-23 02:32:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22917 states, 13428 states have (on average 1.2304140601727733) internal successors, (16522), 13800 states have internal predecessors, (16522), 8147 states have call successors, (8147), 1352 states have call predecessors, (8147), 1338 states have return successors, (8208), 8039 states have call predecessors, (8208), 8126 states have call successors, (8208) [2021-11-23 02:32:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22917 states to 22917 states and 32877 transitions. [2021-11-23 02:32:54,847 INFO L78 Accepts]: Start accepts. Automaton has 22917 states and 32877 transitions. Word has length 171 [2021-11-23 02:32:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 22917 states and 32877 transitions. [2021-11-23 02:32:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 02:32:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22917 states and 32877 transitions. [2021-11-23 02:32:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 02:32:54,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:54,860 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:54,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:32:54,861 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:32:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1548812947, now seen corresponding path program 1 times [2021-11-23 02:32:54,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:54,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50584182] [2021-11-23 02:32:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:54,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-23 02:32:55,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50584182] [2021-11-23 02:32:55,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50584182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:55,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:55,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:32:55,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212520100] [2021-11-23 02:32:55,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:55,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:55,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:55,228 INFO L87 Difference]: Start difference. First operand 22917 states and 32877 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 02:32:58,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:59,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:03,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:05,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:07,339 INFO L93 Difference]: Finished difference Result 22943 states and 32902 transitions. [2021-11-23 02:33:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:33:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 249 [2021-11-23 02:33:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:07,444 INFO L225 Difference]: With dead ends: 22943 [2021-11-23 02:33:07,444 INFO L226 Difference]: Without dead ends: 22939 [2021-11-23 02:33:07,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:33:07,456 INFO L933 BasicCegarLoop]: 3827 mSDtfsCounter, 4163 mSDsluCounter, 8499 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 11458 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:07,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4177 Valid, 11458 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1324 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2021-11-23 02:33:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22939 states. [2021-11-23 02:33:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22939 to 22937. [2021-11-23 02:33:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22937 states, 13443 states have (on average 1.2300825708547198) internal successors, (16536), 13815 states have internal predecessors, (16536), 8147 states have call successors, (8147), 1357 states have call predecessors, (8147), 1343 states have return successors, (8208), 8039 states have call predecessors, (8208), 8126 states have call successors, (8208) [2021-11-23 02:33:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22937 states to 22937 states and 32891 transitions. [2021-11-23 02:33:09,058 INFO L78 Accepts]: Start accepts. Automaton has 22937 states and 32891 transitions. Word has length 249 [2021-11-23 02:33:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:09,059 INFO L470 AbstractCegarLoop]: Abstraction has 22937 states and 32891 transitions. [2021-11-23 02:33:09,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 02:33:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22937 states and 32891 transitions. [2021-11-23 02:33:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-23 02:33:09,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:09,075 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:33:09,076 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:33:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1531377325, now seen corresponding path program 1 times [2021-11-23 02:33:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:09,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433803453] [2021-11-23 02:33:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:09,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-23 02:33:09,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433803453] [2021-11-23 02:33:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433803453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:09,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:09,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:33:09,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835208478] [2021-11-23 02:33:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:09,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:33:09,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:33:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:09,409 INFO L87 Difference]: Start difference. First operand 22937 states and 32891 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-23 02:33:13,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:17,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:20,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:21,232 INFO L93 Difference]: Finished difference Result 22951 states and 32901 transitions. [2021-11-23 02:33:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:33:21,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 269 [2021-11-23 02:33:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:21,339 INFO L225 Difference]: With dead ends: 22951 [2021-11-23 02:33:21,339 INFO L226 Difference]: Without dead ends: 22704 [2021-11-23 02:33:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:33:21,357 INFO L933 BasicCegarLoop]: 5243 mSDtfsCounter, 4161 mSDsluCounter, 15596 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 19512 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 19512 Invalid, 1802 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 1798 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:33:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22704 states. [2021-11-23 02:33:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22704 to 22616. [2021-11-23 02:33:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22616 states, 13250 states have (on average 1.229811320754717) internal successors, (16295), 13609 states have internal predecessors, (16295), 8042 states have call successors, (8042), 1332 states have call predecessors, (8042), 1320 states have return successors, (8109), 7943 states have call predecessors, (8109), 8027 states have call successors, (8109) [2021-11-23 02:33:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22616 states to 22616 states and 32446 transitions. [2021-11-23 02:33:23,094 INFO L78 Accepts]: Start accepts. Automaton has 22616 states and 32446 transitions. Word has length 269 [2021-11-23 02:33:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:23,095 INFO L470 AbstractCegarLoop]: Abstraction has 22616 states and 32446 transitions. [2021-11-23 02:33:23,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-23 02:33:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 22616 states and 32446 transitions. [2021-11-23 02:33:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2021-11-23 02:33:23,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:23,154 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 20, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:23,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:33:23,155 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:33:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash -30015780, now seen corresponding path program 1 times [2021-11-23 02:33:23,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:23,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772135248] [2021-11-23 02:33:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:23,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2021-11-23 02:33:23,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772135248] [2021-11-23 02:33:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772135248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:23,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:23,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066652275] [2021-11-23 02:33:23,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:23,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:23,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:23,596 INFO L87 Difference]: Start difference. First operand 22616 states and 32446 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2021-11-23 02:33:26,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:29,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:30,388 INFO L93 Difference]: Finished difference Result 41461 states and 59428 transitions. [2021-11-23 02:33:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 895 [2021-11-23 02:33:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:30,474 INFO L225 Difference]: With dead ends: 41461 [2021-11-23 02:33:30,474 INFO L226 Difference]: Without dead ends: 18859 [2021-11-23 02:33:30,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:30,558 INFO L933 BasicCegarLoop]: 3825 mSDtfsCounter, 10 mSDsluCounter, 4242 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7639 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:30,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7639 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 862 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-23 02:33:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18859 states. [2021-11-23 02:33:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18859 to 18859. [2021-11-23 02:33:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18859 states, 11029 states have (on average 1.2272191495149152) internal successors, (13535), 11327 states have internal predecessors, (13535), 6697 states have call successors, (6697), 1141 states have call predecessors, (6697), 1129 states have return successors, (6764), 6613 states have call predecessors, (6764), 6682 states have call successors, (6764) [2021-11-23 02:33:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18859 states to 18859 states and 26996 transitions. [2021-11-23 02:33:32,405 INFO L78 Accepts]: Start accepts. Automaton has 18859 states and 26996 transitions. Word has length 895 [2021-11-23 02:33:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 18859 states and 26996 transitions. [2021-11-23 02:33:32,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2021-11-23 02:33:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18859 states and 26996 transitions. [2021-11-23 02:33:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-11-23 02:33:32,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:32,482 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 20, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:32,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:33:32,482 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:33:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1539220387, now seen corresponding path program 1 times [2021-11-23 02:33:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:32,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053285360] [2021-11-23 02:33:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:32,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2021-11-23 02:33:33,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053285360] [2021-11-23 02:33:33,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053285360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:33,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:33,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:33:33,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114532608] [2021-11-23 02:33:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:33,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:33,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:33,010 INFO L87 Difference]: Start difference. First operand 18859 states and 26996 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2021-11-23 02:33:35,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:40,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:42,014 INFO L93 Difference]: Finished difference Result 39891 states and 57917 transitions. [2021-11-23 02:33:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:33:42,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 900 [2021-11-23 02:33:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:42,128 INFO L225 Difference]: With dead ends: 39891 [2021-11-23 02:33:42,128 INFO L226 Difference]: Without dead ends: 22897 [2021-11-23 02:33:42,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:42,196 INFO L933 BasicCegarLoop]: 4582 mSDtfsCounter, 624 mSDsluCounter, 9445 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 185 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 13061 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:42,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 13061 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1555 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 02:33:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22897 states. [2021-11-23 02:33:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22897 to 18871. [2021-11-23 02:33:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18871 states, 11041 states have (on average 1.2269721945475953) internal successors, (13547), 11339 states have internal predecessors, (13547), 6697 states have call successors, (6697), 1141 states have call predecessors, (6697), 1129 states have return successors, (6764), 6613 states have call predecessors, (6764), 6682 states have call successors, (6764) [2021-11-23 02:33:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18871 states to 18871 states and 27008 transitions. [2021-11-23 02:33:43,575 INFO L78 Accepts]: Start accepts. Automaton has 18871 states and 27008 transitions. Word has length 900 [2021-11-23 02:33:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 18871 states and 27008 transitions. [2021-11-23 02:33:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 2 states have call successors, (117), 2 states have call predecessors, (117), 1 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2021-11-23 02:33:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18871 states and 27008 transitions. [2021-11-23 02:33:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2021-11-23 02:33:43,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:43,610 INFO L514 BasicCegarLoop]: trace histogram [26, 23, 20, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:43,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:33:43,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:33:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2045294011, now seen corresponding path program 1 times [2021-11-23 02:33:43,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862863033] [2021-11-23 02:33:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:43,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-11-23 02:33:44,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862863033] [2021-11-23 02:33:44,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862863033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735545260] [2021-11-23 02:33:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:44,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:44,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:44,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:33:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:46,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 7036 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:33:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 1939 trivial. 0 not checked. [2021-11-23 02:33:47,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:47,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735545260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:47,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:47,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-23 02:33:47,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135919121] [2021-11-23 02:33:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:47,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:47,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:47,738 INFO L87 Difference]: Start difference. First operand 18871 states and 27008 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2021-11-23 02:33:53,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:54,204 INFO L93 Difference]: Finished difference Result 37833 states and 54614 transitions. [2021-11-23 02:33:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) Word has length 925 [2021-11-23 02:33:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:54,373 INFO L225 Difference]: With dead ends: 37833 [2021-11-23 02:33:54,373 INFO L226 Difference]: Without dead ends: 18976 [2021-11-23 02:33:54,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 925 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:54,420 INFO L933 BasicCegarLoop]: 3830 mSDtfsCounter, 10 mSDsluCounter, 4255 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7653 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:54,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7653 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 869 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 02:33:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18976 states. [2021-11-23 02:33:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18976 to 18878. [2021-11-23 02:33:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18878 states, 11048 states have (on average 1.2268283852280957) internal successors, (13554), 11346 states have internal predecessors, (13554), 6697 states have call successors, (6697), 1141 states have call predecessors, (6697), 1129 states have return successors, (6764), 6613 states have call predecessors, (6764), 6682 states have call successors, (6764) [2021-11-23 02:33:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18878 states to 18878 states and 27015 transitions. [2021-11-23 02:33:55,648 INFO L78 Accepts]: Start accepts. Automaton has 18878 states and 27015 transitions. Word has length 925 [2021-11-23 02:33:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:55,649 INFO L470 AbstractCegarLoop]: Abstraction has 18878 states and 27015 transitions. [2021-11-23 02:33:55,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2021-11-23 02:33:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18878 states and 27015 transitions. [2021-11-23 02:33:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2021-11-23 02:33:55,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:55,709 INFO L514 BasicCegarLoop]: trace histogram [29, 26, 20, 13, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:55,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:33:55,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:55,923 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:33:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash 592762589, now seen corresponding path program 1 times [2021-11-23 02:33:55,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:55,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588871018] [2021-11-23 02:33:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:55,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3102 trivial. 0 not checked. [2021-11-23 02:33:56,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588871018] [2021-11-23 02:33:56,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588871018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:56,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:56,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:33:56,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364526184] [2021-11-23 02:33:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:56,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:33:56,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:33:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:56,865 INFO L87 Difference]: Start difference. First operand 18878 states and 27015 transitions. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 4 states have internal predecessors, (279), 2 states have call successors, (126), 2 states have call predecessors, (126), 1 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2021-11-23 02:34:01,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:05,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:08,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:09,914 INFO L93 Difference]: Finished difference Result 18887 states and 27021 transitions. [2021-11-23 02:34:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:34:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 4 states have internal predecessors, (279), 2 states have call successors, (126), 2 states have call predecessors, (126), 1 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 955 [2021-11-23 02:34:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:09,971 INFO L225 Difference]: With dead ends: 18887 [2021-11-23 02:34:09,971 INFO L226 Difference]: Without dead ends: 18885 [2021-11-23 02:34:09,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:09,980 INFO L933 BasicCegarLoop]: 5379 mSDtfsCounter, 3834 mSDsluCounter, 15955 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3835 SdHoareTripleChecker+Valid, 19927 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:09,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3835 Valid, 19927 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1906 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-23 02:34:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18885 states. [2021-11-23 02:34:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18885 to 18878. [2021-11-23 02:34:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18878 states, 11048 states have (on average 1.2265568428674873) internal successors, (13551), 11346 states have internal predecessors, (13551), 6697 states have call successors, (6697), 1141 states have call predecessors, (6697), 1129 states have return successors, (6764), 6613 states have call predecessors, (6764), 6682 states have call successors, (6764) [2021-11-23 02:34:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18878 states to 18878 states and 27012 transitions. [2021-11-23 02:34:11,164 INFO L78 Accepts]: Start accepts. Automaton has 18878 states and 27012 transitions. Word has length 955 [2021-11-23 02:34:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:11,165 INFO L470 AbstractCegarLoop]: Abstraction has 18878 states and 27012 transitions. [2021-11-23 02:34:11,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 4 states have internal predecessors, (279), 2 states have call successors, (126), 2 states have call predecessors, (126), 1 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2021-11-23 02:34:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18878 states and 27012 transitions. [2021-11-23 02:34:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-11-23 02:34:11,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:11,186 INFO L514 BasicCegarLoop]: trace histogram [29, 26, 20, 13, 13, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:11,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:34:11,187 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:34:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 80408099, now seen corresponding path program 1 times [2021-11-23 02:34:11,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886679950] [2021-11-23 02:34:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:11,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3133 trivial. 0 not checked. [2021-11-23 02:34:12,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:12,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886679950] [2021-11-23 02:34:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886679950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:12,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:12,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:34:12,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388455715] [2021-11-23 02:34:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:12,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:34:12,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:34:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:12,111 INFO L87 Difference]: Start difference. First operand 18878 states and 27012 transitions. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 4 states have internal predecessors, (288), 2 states have call successors, (127), 2 states have call predecessors, (127), 1 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2021-11-23 02:34:14,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:19,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:22,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:22,757 INFO L93 Difference]: Finished difference Result 24315 states and 34840 transitions. [2021-11-23 02:34:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:34:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 4 states have internal predecessors, (288), 2 states have call successors, (127), 2 states have call predecessors, (127), 1 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) Word has length 977 [2021-11-23 02:34:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:22,849 INFO L225 Difference]: With dead ends: 24315 [2021-11-23 02:34:22,849 INFO L226 Difference]: Without dead ends: 24313 [2021-11-23 02:34:22,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:22,862 INFO L933 BasicCegarLoop]: 4817 mSDtfsCounter, 3829 mSDsluCounter, 14718 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3830 SdHoareTripleChecker+Valid, 18241 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3830 Valid, 18241 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1739 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 02:34:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24313 states. [2021-11-23 02:34:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24313 to 24230. [2021-11-23 02:34:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24230 states, 14196 states have (on average 1.228021978021978) internal successors, (17433), 14588 states have internal predecessors, (17433), 8596 states have call successors, (8596), 1449 states have call predecessors, (8596), 1434 states have return successors, (8704), 8481 states have call predecessors, (8704), 8581 states have call successors, (8704) [2021-11-23 02:34:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24230 states to 24230 states and 34733 transitions. [2021-11-23 02:34:24,394 INFO L78 Accepts]: Start accepts. Automaton has 24230 states and 34733 transitions. Word has length 977 [2021-11-23 02:34:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:24,395 INFO L470 AbstractCegarLoop]: Abstraction has 24230 states and 34733 transitions. [2021-11-23 02:34:24,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 4 states have internal predecessors, (288), 2 states have call successors, (127), 2 states have call predecessors, (127), 1 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2021-11-23 02:34:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 24230 states and 34733 transitions. [2021-11-23 02:34:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-11-23 02:34:24,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:24,412 INFO L514 BasicCegarLoop]: trace histogram [29, 26, 20, 13, 13, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:34:24,413 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:34:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash 680628377, now seen corresponding path program 1 times [2021-11-23 02:34:24,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398128733] [2021-11-23 02:34:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:24,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2021-11-23 02:34:25,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398128733] [2021-11-23 02:34:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398128733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:25,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:25,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:34:25,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066513362] [2021-11-23 02:34:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:25,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:34:25,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:34:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:25,365 INFO L87 Difference]: Start difference. First operand 24230 states and 34733 transitions. Second operand has 6 states, 6 states have (on average 47.833333333333336) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (126), 4 states have call predecessors, (126), 2 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2021-11-23 02:34:29,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:30,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:32,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:41,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:44,611 INFO L93 Difference]: Finished difference Result 24674 states and 35434 transitions. [2021-11-23 02:34:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:34:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 47.833333333333336) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (126), 4 states have call predecessors, (126), 2 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) Word has length 977 [2021-11-23 02:34:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:44,706 INFO L225 Difference]: With dead ends: 24674 [2021-11-23 02:34:44,706 INFO L226 Difference]: Without dead ends: 24672 [2021-11-23 02:34:44,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:34:44,717 INFO L933 BasicCegarLoop]: 2788 mSDtfsCounter, 3811 mSDsluCounter, 5663 mSDsCounter, 0 mSdLazyCounter, 6923 mSolverCounterSat, 2897 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4261 SdHoareTripleChecker+Valid, 7799 SdHoareTripleChecker+Invalid, 9822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2897 IncrementalHoareTripleChecker+Valid, 6923 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:44,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4261 Valid, 7799 Invalid, 9822 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2897 Valid, 6923 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2021-11-23 02:34:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24672 states. [2021-11-23 02:34:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24672 to 24444. [2021-11-23 02:34:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24444 states, 14333 states have (on average 1.2287727621572595) internal successors, (17612), 14733 states have internal predecessors, (17612), 8671 states have call successors, (8671), 1449 states have call predecessors, (8671), 1437 states have return successors, (8785), 8556 states have call predecessors, (8785), 8656 states have call successors, (8785) [2021-11-23 02:34:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24444 states to 24444 states and 35068 transitions. [2021-11-23 02:34:46,335 INFO L78 Accepts]: Start accepts. Automaton has 24444 states and 35068 transitions. Word has length 977 [2021-11-23 02:34:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:46,336 INFO L470 AbstractCegarLoop]: Abstraction has 24444 states and 35068 transitions. [2021-11-23 02:34:46,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.833333333333336) internal successors, (287), 5 states have internal predecessors, (287), 3 states have call successors, (126), 4 states have call predecessors, (126), 2 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2021-11-23 02:34:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 24444 states and 35068 transitions. [2021-11-23 02:34:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2021-11-23 02:34:46,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:46,354 INFO L514 BasicCegarLoop]: trace histogram [31, 26, 20, 14, 14, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:46,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:34:46,354 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:34:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash -116734510, now seen corresponding path program 1 times [2021-11-23 02:34:46,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:46,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761965647] [2021-11-23 02:34:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:46,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 3217 trivial. 0 not checked. [2021-11-23 02:34:47,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761965647] [2021-11-23 02:34:47,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761965647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:47,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:34:47,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284695526] [2021-11-23 02:34:47,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:34:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:34:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:34:47,208 INFO L87 Difference]: Start difference. First operand 24444 states and 35068 transitions. Second operand has 8 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 3 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (132), 3 states have call predecessors, (132), 2 states have call successors, (132) [2021-11-23 02:34:50,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:52,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:53,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:55,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:57,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:59,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:05,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:22,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:27,167 INFO L93 Difference]: Finished difference Result 64965 states and 95747 transitions. [2021-11-23 02:35:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:35:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 3 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (132), 3 states have call predecessors, (132), 2 states have call successors, (132) Word has length 991 [2021-11-23 02:35:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:27,299 INFO L225 Difference]: With dead ends: 64965 [2021-11-23 02:35:27,299 INFO L226 Difference]: Without dead ends: 42387 [2021-11-23 02:35:27,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:35:27,359 INFO L933 BasicCegarLoop]: 7666 mSDtfsCounter, 3127 mSDsluCounter, 42717 mSDsCounter, 0 mSdLazyCounter, 8992 mSolverCounterSat, 2164 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 46021 SdHoareTripleChecker+Invalid, 11161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2164 IncrementalHoareTripleChecker+Valid, 8992 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:27,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3560 Valid, 46021 Invalid, 11161 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2164 Valid, 8992 Invalid, 5 Unknown, 0 Unchecked, 37.7s Time] [2021-11-23 02:35:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42387 states. [2021-11-23 02:35:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42387 to 24453. [2021-11-23 02:35:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24453 states, 14339 states have (on average 1.2286770346607154) internal successors, (17618), 14736 states have internal predecessors, (17618), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1437 states have return successors, (8788), 8559 states have call predecessors, (8788), 8659 states have call successors, (8788) [2021-11-23 02:35:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24453 states to 24453 states and 35080 transitions. [2021-11-23 02:35:30,314 INFO L78 Accepts]: Start accepts. Automaton has 24453 states and 35080 transitions. Word has length 991 [2021-11-23 02:35:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:30,316 INFO L470 AbstractCegarLoop]: Abstraction has 24453 states and 35080 transitions. [2021-11-23 02:35:30,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 3 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (132), 3 states have call predecessors, (132), 2 states have call successors, (132) [2021-11-23 02:35:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24453 states and 35080 transitions. [2021-11-23 02:35:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2021-11-23 02:35:30,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:30,345 INFO L514 BasicCegarLoop]: trace histogram [31, 26, 20, 14, 14, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:30,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:35:30,346 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:35:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1163103550, now seen corresponding path program 1 times [2021-11-23 02:35:30,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:30,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287435108] [2021-11-23 02:35:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:30,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3275 trivial. 0 not checked. [2021-11-23 02:35:31,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287435108] [2021-11-23 02:35:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287435108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:31,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:31,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:35:31,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263645016] [2021-11-23 02:35:31,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:35:31,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:35:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:35:31,467 INFO L87 Difference]: Start difference. First operand 24453 states and 35080 transitions. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 4 states have internal predecessors, (296), 2 states have call successors, (135), 2 states have call predecessors, (135), 2 states have return successors, (133), 3 states have call predecessors, (133), 2 states have call successors, (133) [2021-11-23 02:35:34,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:38,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:40,238 INFO L93 Difference]: Finished difference Result 48918 states and 70636 transitions. [2021-11-23 02:35:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:35:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 4 states have internal predecessors, (296), 2 states have call successors, (135), 2 states have call predecessors, (135), 2 states have return successors, (133), 3 states have call predecessors, (133), 2 states have call successors, (133) Word has length 994 [2021-11-23 02:35:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:40,355 INFO L225 Difference]: With dead ends: 48918 [2021-11-23 02:35:40,355 INFO L226 Difference]: Without dead ends: 26331 [2021-11-23 02:35:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:35:40,410 INFO L933 BasicCegarLoop]: 4145 mSDtfsCounter, 198 mSDsluCounter, 13576 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 16331 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:40,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 16331 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1906 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:35:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2021-11-23 02:35:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 24485. [2021-11-23 02:35:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24485 states, 14363 states have (on average 1.2282949244586785) internal successors, (17642), 14760 states have internal predecessors, (17642), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1445 states have return successors, (8833), 8567 states have call predecessors, (8833), 8659 states have call successors, (8833) [2021-11-23 02:35:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24485 states to 24485 states and 35149 transitions. [2021-11-23 02:35:42,418 INFO L78 Accepts]: Start accepts. Automaton has 24485 states and 35149 transitions. Word has length 994 [2021-11-23 02:35:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 24485 states and 35149 transitions. [2021-11-23 02:35:42,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 4 states have internal predecessors, (296), 2 states have call successors, (135), 2 states have call predecessors, (135), 2 states have return successors, (133), 3 states have call predecessors, (133), 2 states have call successors, (133) [2021-11-23 02:35:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24485 states and 35149 transitions. [2021-11-23 02:35:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1029 [2021-11-23 02:35:42,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:42,449 INFO L514 BasicCegarLoop]: trace histogram [33, 28, 23, 14, 14, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:42,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:35:42,450 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:35:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -289576652, now seen corresponding path program 1 times [2021-11-23 02:35:42,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775283490] [2021-11-23 02:35:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:42,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3633 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2021-11-23 02:35:43,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775283490] [2021-11-23 02:35:43,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775283490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:43,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:43,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:35:43,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511964483] [2021-11-23 02:35:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:43,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:35:43,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:35:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:35:43,510 INFO L87 Difference]: Start difference. First operand 24485 states and 35149 transitions. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 4 states have internal predecessors, (309), 2 states have call successors, (142), 2 states have call predecessors, (142), 2 states have return successors, (140), 3 states have call predecessors, (140), 2 states have call successors, (140) [2021-11-23 02:35:47,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:53,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:54,684 INFO L93 Difference]: Finished difference Result 48982 states and 70740 transitions. [2021-11-23 02:35:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:35:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 4 states have internal predecessors, (309), 2 states have call successors, (142), 2 states have call predecessors, (142), 2 states have return successors, (140), 3 states have call predecessors, (140), 2 states have call successors, (140) Word has length 1028 [2021-11-23 02:35:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:54,861 INFO L225 Difference]: With dead ends: 48982 [2021-11-23 02:35:54,861 INFO L226 Difference]: Without dead ends: 26363 [2021-11-23 02:35:54,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:35:54,913 INFO L933 BasicCegarLoop]: 4147 mSDtfsCounter, 198 mSDsluCounter, 13580 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 16337 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:54,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 16337 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1907 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:35:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26363 states. [2021-11-23 02:35:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26363 to 24517. [2021-11-23 02:35:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24517 states, 14387 states have (on average 1.2279140891082228) internal successors, (17666), 14784 states have internal predecessors, (17666), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1453 states have return successors, (8849), 8575 states have call predecessors, (8849), 8659 states have call successors, (8849) [2021-11-23 02:35:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24517 states to 24517 states and 35189 transitions. [2021-11-23 02:35:56,998 INFO L78 Accepts]: Start accepts. Automaton has 24517 states and 35189 transitions. Word has length 1028 [2021-11-23 02:35:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:56,999 INFO L470 AbstractCegarLoop]: Abstraction has 24517 states and 35189 transitions. [2021-11-23 02:35:56,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 4 states have internal predecessors, (309), 2 states have call successors, (142), 2 states have call predecessors, (142), 2 states have return successors, (140), 3 states have call predecessors, (140), 2 states have call successors, (140) [2021-11-23 02:35:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24517 states and 35189 transitions. [2021-11-23 02:35:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2021-11-23 02:35:57,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:57,022 INFO L514 BasicCegarLoop]: trace histogram [35, 30, 25, 14, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:57,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 02:35:57,022 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:35:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -985025176, now seen corresponding path program 1 times [2021-11-23 02:35:57,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:57,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49125283] [2021-11-23 02:35:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:57,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4337 trivial. 0 not checked. [2021-11-23 02:35:57,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49125283] [2021-11-23 02:35:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49125283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780863136] [2021-11-23 02:35:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:57,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:57,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:57,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:35:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 7911 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:36:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 1284 proven. 0 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2021-11-23 02:36:01,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:01,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780863136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:01,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:01,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-23 02:36:01,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350407881] [2021-11-23 02:36:01,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:01,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:01,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:36:01,791 INFO L87 Difference]: Start difference. First operand 24517 states and 35189 transitions. Second operand has 7 states, 6 states have (on average 59.833333333333336) internal successors, (359), 5 states have internal predecessors, (359), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (156), 4 states have call predecessors, (156), 2 states have call successors, (156) [2021-11-23 02:36:06,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:12,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:14,618 INFO L93 Difference]: Finished difference Result 49116 states and 70887 transitions. [2021-11-23 02:36:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:36:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 59.833333333333336) internal successors, (359), 5 states have internal predecessors, (359), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (156), 4 states have call predecessors, (156), 2 states have call successors, (156) Word has length 1113 [2021-11-23 02:36:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:14,699 INFO L225 Difference]: With dead ends: 49116 [2021-11-23 02:36:14,699 INFO L226 Difference]: Without dead ends: 24613 [2021-11-23 02:36:14,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1119 GetRequests, 1110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:36:14,756 INFO L933 BasicCegarLoop]: 3840 mSDtfsCounter, 2 mSDsluCounter, 21351 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23031 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:14,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 23031 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2614 Invalid, 1 Unknown, 0 Unchecked, 11.6s Time] [2021-11-23 02:36:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24613 states. [2021-11-23 02:36:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24613 to 24571. [2021-11-23 02:36:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24571 states, 14423 states have (on average 1.2273452125078) internal successors, (17702), 14820 states have internal predecessors, (17702), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1471 states have return successors, (8970), 8593 states have call predecessors, (8970), 8659 states have call successors, (8970) [2021-11-23 02:36:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24571 states to 24571 states and 35346 transitions. [2021-11-23 02:36:16,763 INFO L78 Accepts]: Start accepts. Automaton has 24571 states and 35346 transitions. Word has length 1113 [2021-11-23 02:36:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 24571 states and 35346 transitions. [2021-11-23 02:36:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 59.833333333333336) internal successors, (359), 5 states have internal predecessors, (359), 2 states have call successors, (158), 2 states have call predecessors, (158), 4 states have return successors, (156), 4 states have call predecessors, (156), 2 states have call successors, (156) [2021-11-23 02:36:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24571 states and 35346 transitions. [2021-11-23 02:36:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1130 [2021-11-23 02:36:16,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:16,782 INFO L514 BasicCegarLoop]: trace histogram [36, 31, 25, 14, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:16,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:36:16,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 02:36:16,999 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:36:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1634835859, now seen corresponding path program 1 times [2021-11-23 02:36:16,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:16,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775285169] [2021-11-23 02:36:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:17,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4471 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2021-11-23 02:36:17,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775285169] [2021-11-23 02:36:17,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775285169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:17,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:17,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:36:17,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601443584] [2021-11-23 02:36:17,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:17,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:36:17,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:17,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:36:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:17,634 INFO L87 Difference]: Start difference. First operand 24571 states and 35346 transitions. Second operand has 7 states, 6 states have (on average 54.833333333333336) internal successors, (329), 5 states have internal predecessors, (329), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (147), 4 states have call predecessors, (147), 2 states have call successors, (147) [2021-11-23 02:36:22,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:24,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:26,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:30,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:32,047 INFO L93 Difference]: Finished difference Result 49188 states and 71062 transitions. [2021-11-23 02:36:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:36:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 54.833333333333336) internal successors, (329), 5 states have internal predecessors, (329), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (147), 4 states have call predecessors, (147), 2 states have call successors, (147) Word has length 1129 [2021-11-23 02:36:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:32,131 INFO L225 Difference]: With dead ends: 49188 [2021-11-23 02:36:32,131 INFO L226 Difference]: Without dead ends: 24631 [2021-11-23 02:36:32,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:32,190 INFO L933 BasicCegarLoop]: 3836 mSDtfsCounter, 1 mSDsluCounter, 21331 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23007 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:32,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 23007 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2613 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2021-11-23 02:36:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24631 states. [2021-11-23 02:36:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24631 to 24589. [2021-11-23 02:36:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24589 states, 14441 states have (on average 1.2270618378228655) internal successors, (17720), 14829 states have internal predecessors, (17720), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1471 states have return successors, (8970), 8602 states have call predecessors, (8970), 8659 states have call successors, (8970) [2021-11-23 02:36:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24589 states to 24589 states and 35364 transitions. [2021-11-23 02:36:34,129 INFO L78 Accepts]: Start accepts. Automaton has 24589 states and 35364 transitions. Word has length 1129 [2021-11-23 02:36:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:34,130 INFO L470 AbstractCegarLoop]: Abstraction has 24589 states and 35364 transitions. [2021-11-23 02:36:34,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 54.833333333333336) internal successors, (329), 5 states have internal predecessors, (329), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (147), 4 states have call predecessors, (147), 2 states have call successors, (147) [2021-11-23 02:36:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24589 states and 35364 transitions. [2021-11-23 02:36:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1146 [2021-11-23 02:36:34,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:34,149 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 14, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:34,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 02:36:34,150 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:36:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1714261960, now seen corresponding path program 1 times [2021-11-23 02:36:34,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469803254] [2021-11-23 02:36:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:34,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4617 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4617 trivial. 0 not checked. [2021-11-23 02:36:35,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469803254] [2021-11-23 02:36:35,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469803254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:35,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:35,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:36:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342714047] [2021-11-23 02:36:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:36:35,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:36:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:36:35,228 INFO L87 Difference]: Start difference. First operand 24589 states and 35364 transitions. Second operand has 8 states, 8 states have (on average 40.75) internal successors, (326), 6 states have internal predecessors, (326), 2 states have call successors, (148), 2 states have call predecessors, (148), 3 states have return successors, (146), 4 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-23 02:36:38,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:40,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:44,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:49,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:51,041 INFO L93 Difference]: Finished difference Result 51088 states and 74305 transitions. [2021-11-23 02:36:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:36:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 40.75) internal successors, (326), 6 states have internal predecessors, (326), 2 states have call successors, (148), 2 states have call predecessors, (148), 3 states have return successors, (146), 4 states have call predecessors, (146), 2 states have call successors, (146) Word has length 1145 [2021-11-23 02:36:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:51,136 INFO L225 Difference]: With dead ends: 51088 [2021-11-23 02:36:51,136 INFO L226 Difference]: Without dead ends: 26513 [2021-11-23 02:36:51,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:36:51,202 INFO L933 BasicCegarLoop]: 4145 mSDtfsCounter, 200 mSDsluCounter, 27451 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 28761 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:51,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 28761 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3378 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2021-11-23 02:36:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26513 states. [2021-11-23 02:36:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26513 to 24625. [2021-11-23 02:36:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24625 states, 14468 states have (on average 1.226638097871164) internal successors, (17747), 14856 states have internal predecessors, (17747), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1480 states have return successors, (8988), 8611 states have call predecessors, (8988), 8659 states have call successors, (8988) [2021-11-23 02:36:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24625 states to 24625 states and 35409 transitions. [2021-11-23 02:36:53,173 INFO L78 Accepts]: Start accepts. Automaton has 24625 states and 35409 transitions. Word has length 1145 [2021-11-23 02:36:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 24625 states and 35409 transitions. [2021-11-23 02:36:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.75) internal successors, (326), 6 states have internal predecessors, (326), 2 states have call successors, (148), 2 states have call predecessors, (148), 3 states have return successors, (146), 4 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-23 02:36:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24625 states and 35409 transitions. [2021-11-23 02:36:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2021-11-23 02:36:53,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:53,193 INFO L514 BasicCegarLoop]: trace histogram [38, 33, 26, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:53,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 02:36:53,193 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:36:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:53,194 INFO L85 PathProgramCache]: Analyzing trace with hash 741309304, now seen corresponding path program 1 times [2021-11-23 02:36:53,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:53,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494105428] [2021-11-23 02:36:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:53,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5073 trivial. 0 not checked. [2021-11-23 02:36:53,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494105428] [2021-11-23 02:36:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494105428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:53,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:36:53,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:36:53,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127932558] [2021-11-23 02:36:53,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:53,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:36:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:36:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:36:53,827 INFO L87 Difference]: Start difference. First operand 24625 states and 35409 transitions. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 4 states have internal predecessors, (327), 2 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (147), 3 states have call predecessors, (147), 2 states have call successors, (147) [2021-11-23 02:36:57,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:59,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:03,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:04,891 INFO L93 Difference]: Finished difference Result 49181 states and 71133 transitions. [2021-11-23 02:37:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 4 states have internal predecessors, (327), 2 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (147), 3 states have call predecessors, (147), 2 states have call successors, (147) Word has length 1183 [2021-11-23 02:37:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:04,980 INFO L225 Difference]: With dead ends: 49181 [2021-11-23 02:37:04,980 INFO L226 Difference]: Without dead ends: 26434 [2021-11-23 02:37:05,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:05,035 INFO L933 BasicCegarLoop]: 4030 mSDtfsCounter, 198 mSDsluCounter, 13244 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 15930 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:05,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 15930 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1833 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 02:37:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26434 states. [2021-11-23 02:37:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26434 to 24625. [2021-11-23 02:37:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24625 states, 14468 states have (on average 1.226638097871164) internal successors, (17747), 14856 states have internal predecessors, (17747), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1480 states have return successors, (8988), 8611 states have call predecessors, (8988), 8659 states have call successors, (8988) [2021-11-23 02:37:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24625 states to 24625 states and 35409 transitions. [2021-11-23 02:37:07,083 INFO L78 Accepts]: Start accepts. Automaton has 24625 states and 35409 transitions. Word has length 1183 [2021-11-23 02:37:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:07,084 INFO L470 AbstractCegarLoop]: Abstraction has 24625 states and 35409 transitions. [2021-11-23 02:37:07,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 4 states have internal predecessors, (327), 2 states have call successors, (149), 2 states have call predecessors, (149), 2 states have return successors, (147), 3 states have call predecessors, (147), 2 states have call successors, (147) [2021-11-23 02:37:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24625 states and 35409 transitions. [2021-11-23 02:37:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2021-11-23 02:37:07,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:07,103 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 14, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 02:37:07,103 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:37:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1984316499, now seen corresponding path program 1 times [2021-11-23 02:37:07,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334434870] [2021-11-23 02:37:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4617 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4617 trivial. 0 not checked. [2021-11-23 02:37:08,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:08,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334434870] [2021-11-23 02:37:08,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334434870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:08,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:08,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:08,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642791021] [2021-11-23 02:37:08,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:08,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:37:08,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:37:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:37:08,064 INFO L87 Difference]: Start difference. First operand 24625 states and 35409 transitions. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 2 states have call successors, (147), 2 states have call predecessors, (147), 1 states have return successors, (145), 2 states have call predecessors, (145), 2 states have call successors, (145) [2021-11-23 02:37:10,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:13,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:16,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:19,152 INFO L93 Difference]: Finished difference Result 52885 states and 76734 transitions. [2021-11-23 02:37:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:37:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 2 states have call successors, (147), 2 states have call predecessors, (147), 1 states have return successors, (145), 2 states have call predecessors, (145), 2 states have call successors, (145) Word has length 1139 [2021-11-23 02:37:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:19,263 INFO L225 Difference]: With dead ends: 52885 [2021-11-23 02:37:19,263 INFO L226 Difference]: Without dead ends: 28274 [2021-11-23 02:37:19,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:19,334 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 590 mSDsluCounter, 8978 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 178 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 12310 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:19,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 12310 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1418 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-11-23 02:37:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28274 states. [2021-11-23 02:37:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28274 to 24643. [2021-11-23 02:37:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24643 states, 14486 states have (on average 1.2263564821206683) internal successors, (17765), 14874 states have internal predecessors, (17765), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1480 states have return successors, (8988), 8611 states have call predecessors, (8988), 8659 states have call successors, (8988) [2021-11-23 02:37:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24643 states to 24643 states and 35427 transitions. [2021-11-23 02:37:21,372 INFO L78 Accepts]: Start accepts. Automaton has 24643 states and 35427 transitions. Word has length 1139 [2021-11-23 02:37:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:21,372 INFO L470 AbstractCegarLoop]: Abstraction has 24643 states and 35427 transitions. [2021-11-23 02:37:21,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 2 states have call successors, (147), 2 states have call predecessors, (147), 1 states have return successors, (145), 2 states have call predecessors, (145), 2 states have call successors, (145) [2021-11-23 02:37:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 24643 states and 35427 transitions. [2021-11-23 02:37:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1157 [2021-11-23 02:37:21,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:21,395 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-23 02:37:21,396 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:37:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash 585692377, now seen corresponding path program 1 times [2021-11-23 02:37:21,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690010205] [2021-11-23 02:37:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:21,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4742 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4740 trivial. 0 not checked. [2021-11-23 02:37:22,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690010205] [2021-11-23 02:37:22,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690010205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:22,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:22,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:37:22,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201830625] [2021-11-23 02:37:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:22,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:22,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:22,476 INFO L87 Difference]: Start difference. First operand 24643 states and 35427 transitions. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 4 states have internal predecessors, (325), 2 states have call successors, (148), 2 states have call predecessors, (148), 2 states have return successors, (146), 3 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-23 02:37:28,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:32,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:33,906 INFO L93 Difference]: Finished difference Result 47477 states and 68375 transitions. [2021-11-23 02:37:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 4 states have internal predecessors, (325), 2 states have call successors, (148), 2 states have call predecessors, (148), 2 states have return successors, (146), 3 states have call predecessors, (146), 2 states have call successors, (146) Word has length 1156 [2021-11-23 02:37:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:33,995 INFO L225 Difference]: With dead ends: 47477 [2021-11-23 02:37:33,995 INFO L226 Difference]: Without dead ends: 24679 [2021-11-23 02:37:34,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:34,053 INFO L933 BasicCegarLoop]: 3823 mSDtfsCounter, 0 mSDsluCounter, 12760 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15290 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:34,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15290 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1736 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 02:37:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24679 states. [2021-11-23 02:37:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24679 to 24679. [2021-11-23 02:37:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24679 states, 14513 states have (on average 1.225935368290498) internal successors, (17792), 14901 states have internal predecessors, (17792), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1489 states have return successors, (9050), 8620 states have call predecessors, (9050), 8659 states have call successors, (9050) [2021-11-23 02:37:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24679 states to 24679 states and 35516 transitions. [2021-11-23 02:37:36,076 INFO L78 Accepts]: Start accepts. Automaton has 24679 states and 35516 transitions. Word has length 1156 [2021-11-23 02:37:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:36,077 INFO L470 AbstractCegarLoop]: Abstraction has 24679 states and 35516 transitions. [2021-11-23 02:37:36,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 4 states have internal predecessors, (325), 2 states have call successors, (148), 2 states have call predecessors, (148), 2 states have return successors, (146), 3 states have call predecessors, (146), 2 states have call successors, (146) [2021-11-23 02:37:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24679 states and 35516 transitions. [2021-11-23 02:37:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2021-11-23 02:37:36,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:36,099 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 18, 18, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:36,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 02:37:36,100 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:37:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -292920995, now seen corresponding path program 1 times [2021-11-23 02:37:36,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:36,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055648360] [2021-11-23 02:37:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:36,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4853 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2021-11-23 02:37:37,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055648360] [2021-11-23 02:37:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055648360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950502498] [2021-11-23 02:37:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:37,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:37,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:37,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:37:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 8129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 02:37:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4853 backedges. 779 proven. 29 refuted. 0 times theorem prover too weak. 4045 trivial. 0 not checked. [2021-11-23 02:37:41,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:37:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4853 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 4825 trivial. 0 not checked. [2021-11-23 02:37:44,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950502498] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:44,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:37:44,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 21 [2021-11-23 02:37:44,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963422133] [2021-11-23 02:37:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:44,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:37:44,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:37:44,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:37:44,765 INFO L87 Difference]: Start difference. First operand 24679 states and 35516 transitions. Second operand has 9 states, 8 states have (on average 41.125) internal successors, (329), 6 states have internal predecessors, (329), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (150), 5 states have call predecessors, (150), 2 states have call successors, (150) [2021-11-23 02:37:51,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:53,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:55,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:57,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:02,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:04,859 INFO L93 Difference]: Finished difference Result 49348 states and 71494 transitions. [2021-11-23 02:38:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:38:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 41.125) internal successors, (329), 6 states have internal predecessors, (329), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (150), 5 states have call predecessors, (150), 2 states have call successors, (150) Word has length 1169 [2021-11-23 02:38:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:04,954 INFO L225 Difference]: With dead ends: 49348 [2021-11-23 02:38:04,955 INFO L226 Difference]: Without dead ends: 26553 [2021-11-23 02:38:05,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2342 GetRequests, 2323 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:38:05,013 INFO L933 BasicCegarLoop]: 4064 mSDtfsCounter, 198 mSDsluCounter, 31455 mSDsCounter, 0 mSdLazyCounter, 3737 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 32303 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3737 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:05,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 32303 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3737 Invalid, 3 Unknown, 0 Unchecked, 18.5s Time] [2021-11-23 02:38:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26553 states. [2021-11-23 02:38:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26553 to 24719. [2021-11-23 02:38:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24719 states, 14537 states have (on average 1.2255623581206576) internal successors, (17816), 14925 states have internal predecessors, (17816), 8674 states have call successors, (8674), 1449 states have call predecessors, (8674), 1505 states have return successors, (9138), 8636 states have call predecessors, (9138), 8659 states have call successors, (9138) [2021-11-23 02:38:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24719 states to 24719 states and 35628 transitions. [2021-11-23 02:38:07,185 INFO L78 Accepts]: Start accepts. Automaton has 24719 states and 35628 transitions. Word has length 1169 [2021-11-23 02:38:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:07,186 INFO L470 AbstractCegarLoop]: Abstraction has 24719 states and 35628 transitions. [2021-11-23 02:38:07,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 41.125) internal successors, (329), 6 states have internal predecessors, (329), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (150), 5 states have call predecessors, (150), 2 states have call successors, (150) [2021-11-23 02:38:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24719 states and 35628 transitions. [2021-11-23 02:38:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2021-11-23 02:38:07,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:07,206 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 18, 18, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:07,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:07,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 02:38:07,412 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:38:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1166884421, now seen corresponding path program 1 times [2021-11-23 02:38:07,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:07,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11451084] [2021-11-23 02:38:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:07,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4861 backedges. 21 proven. 132 refuted. 0 times theorem prover too weak. 4708 trivial. 0 not checked. [2021-11-23 02:38:09,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11451084] [2021-11-23 02:38:09,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11451084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964936562] [2021-11-23 02:38:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:09,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:09,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:38:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 8149 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:38:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4861 backedges. 1587 proven. 0 refuted. 0 times theorem prover too weak. 3274 trivial. 0 not checked. [2021-11-23 02:38:13,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:13,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964936562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:13,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:13,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-23 02:38:13,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756697384] [2021-11-23 02:38:13,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:13,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:38:13,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:38:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:38:13,608 INFO L87 Difference]: Start difference. First operand 24719 states and 35628 transitions. Second operand has 6 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 3 states have call successors, (162), 2 states have call predecessors, (162), 3 states have return successors, (160), 4 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-23 02:38:17,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:19,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:22,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:24,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:26,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:28,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:29,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:31,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:33,080 INFO L93 Difference]: Finished difference Result 49674 states and 72611 transitions. [2021-11-23 02:38:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:38:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 3 states have call successors, (162), 2 states have call predecessors, (162), 3 states have return successors, (160), 4 states have call predecessors, (160), 3 states have call successors, (160) Word has length 1175 [2021-11-23 02:38:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:33,167 INFO L225 Difference]: With dead ends: 49674 [2021-11-23 02:38:33,167 INFO L226 Difference]: Without dead ends: 24969 [2021-11-23 02:38:33,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1181 GetRequests, 1174 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:38:33,230 INFO L933 BasicCegarLoop]: 3830 mSDtfsCounter, 8 mSDsluCounter, 17032 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19138 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:33,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19138 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2179 Invalid, 3 Unknown, 0 Unchecked, 18.1s Time] [2021-11-23 02:38:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24969 states. [2021-11-23 02:38:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24969 to 24915. [2021-11-23 02:38:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24915 states, 14663 states have (on average 1.2255336561413082) internal successors, (17970), 15051 states have internal predecessors, (17970), 8730 states have call successors, (8730), 1449 states have call predecessors, (8730), 1519 states have return successors, (9250), 8706 states have call predecessors, (9250), 8715 states have call successors, (9250) [2021-11-23 02:38:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24915 states to 24915 states and 35950 transitions. [2021-11-23 02:38:35,163 INFO L78 Accepts]: Start accepts. Automaton has 24915 states and 35950 transitions. Word has length 1175 [2021-11-23 02:38:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 24915 states and 35950 transitions. [2021-11-23 02:38:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 3 states have call successors, (162), 2 states have call predecessors, (162), 3 states have return successors, (160), 4 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-23 02:38:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 24915 states and 35950 transitions. [2021-11-23 02:38:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2021-11-23 02:38:35,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:35,185 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 25, 18, 18, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:35,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:35,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:35,385 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-23 02:38:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 240652391, now seen corresponding path program 1 times [2021-11-23 02:38:35,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:35,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880270365] [2021-11-23 02:38:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:35,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5034 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-11-23 02:38:36,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880270365] [2021-11-23 02:38:36,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880270365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317389638] [2021-11-23 02:38:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:36,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:36,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:36,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_595963a2-b7c7-471c-895f-2b507191b750/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:38:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 8223 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5034 backedges. 1614 proven. 1 refuted. 0 times theorem prover too weak. 3419 trivial. 0 not checked. [2021-11-23 02:38:40,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:38:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5034 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-11-23 02:38:43,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317389638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:38:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675951925] [2021-11-23 02:38:43,071 INFO L159 IcfgInterpreter]: Started Sifa with 531 locations of interest [2021-11-23 02:38:43,071 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:38:43,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:38:43,089 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:38:43,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs